The Latching Seal Mandrel was designed for efﬁciency and economy in the completion of segregated zone wells. The mandrel is made up to the coiled tubing string using a slip-type tubing connector or alternately, a roll-on nipple. A tail joint and any required tools such as pump-out plugs or landing nipples can be installed below the mandrel. The coiled tubing string is run in the hole through the packer proﬁle, and as the mandrel passes through the packer bore, the collet ﬁngers collapse, allowing free passage of the seal mandrel. Once through the packer, the collet ﬁngers prevent the seal mandrel from passing upward, securely locating the Latching Seal Mandrel in place.

When clean-out procedures are ﬁnished, the primary string is returned to the hang-off position relocating the mandrel in the packer bore; thus reestablishing segregation. To retrieve the mandrel from the well, simply over-pull to the preset shear value and release the collet-retaining ring. This allows the collet to collapse and the seal mandrel to pass upward through the packer for removal from the well.